<s>
MeTA1	B-Protocol
is	O
a	O
mail	B-Protocol
transfer	I-Protocol
agent	I-Protocol
(	O
MTA	O
)	O
that	O
has	O
been	O
designed	O
with	O
these	O
main	O
topics	O
in	O
minds	O
:	O
security	O
,	O
reliability	O
,	O
efficiency	O
,	O
configurability	O
and	O
extendibility	O
.	O
</s>
<s>
It	O
supports	O
the	O
Simple	B-Protocol
Mail	I-Protocol
Transfer	I-Protocol
Protocol	I-Protocol
(	O
SMTP	B-Protocol
)	O
as	O
specified	O
by	O
RFC	B-Protocol
2821	I-Protocol
and	O
various	O
extensions	O
.	O
</s>
<s>
The	O
next	O
generation	O
of	O
Sendmail	B-Application
was	O
initially	O
called	O
Sendmail	B-Application
X	O
;	O
it	O
was	O
previously	O
called	O
Sendmail	B-Application
9	O
,	O
but	O
it	O
does	O
not	O
derive	O
from	O
the	O
Sendmail	B-Application
version	O
8	O
code	B-General_Concept
base	I-General_Concept
.	O
</s>
<s>
However	O
,	O
the	O
development	O
of	O
Sendmail	B-Application
X	O
was	O
stopped	O
in	O
favor	O
of	O
a	O
new	O
project	O
called	O
MeTA1	B-Protocol
.	O
</s>
<s>
The	O
first	O
release	O
of	O
Sendmail	B-Application
X	O
smX-0.0.0.0	O
was	O
made	O
available	O
on	O
October	O
30	O
,	O
2005	O
.	O
</s>
<s>
The	O
final	O
release	O
was	O
smX-1.0.PreAlpha7.0	O
,	O
released	O
on	O
May	O
20	O
,	O
2006	O
,	O
under	O
the	O
same	O
license	O
used	O
by	O
Sendmail	B-Application
8	O
.	O
</s>
<s>
MeTA1	B-Protocol
1.0.0.0	O
was	O
released	O
on	O
May	O
25	O
,	O
2014	O
.	O
</s>
